1. "The Problem" is almost never caused by "the worst thing that could
happen."
2. Humans will nearly always assume it's "the worst thing that could
happen."
While learning to fly an airplane many years ago, IP told me, "By far,
the reason for landing with the gear up is because you
I got a KPA500 this summer and it was doing a lot of faulting. I had to
"correct" a few things that were just fine at 100 watts.
1: I discovered that a solder joint in the UNUN had gone bad, and fixed
that. That solved most of the faults.
2: With still the occasional fault, I looked again
Amazingly, it is probably not the KPA500.
We have been seeing quite a few inquiries about this. Analysis almost always
shows an issue in the antenna system caused by high power.
There are a few things at play. When measuring SWR (or better, antenna S
parameters) at low power, you will get the
I have pretty much the same symptoms reported by the KPA1500 users here. The
higher the frequency the more likely to see a fault. 10M is the worst one.
The amp shows a 2:1 SWR and that is running it into a tuned KAT500, which shows
1.2:1 and a Daiwa bridge showing 1.1:1 into the antenna.
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